铜藻对几种无机盐的吸收动力学的初步研究-上海海洋大学学报.PDFVIP

第 16 卷第6 期 上海水产大学学报 Vol. 16 , No.6 2007 年 11 月 JOURNAL OF SHANGHAI FISHERIES UNIVERSITY Nov. ,2007 文章编号: 1004 - 7271 ( 2007 ) 06 - 0573 - 07 铜藻对几种无机盐的吸收动力学的初步研究 孙宏超， 章守宇 (上海水产大学海洋学院，上海 200090) 摘 要:以浙江省拘祀岛马尾藻场为研究海域，通过铜藻对元机磷、硅酸盐、亚硝酸盐和氨氮的吸收实验，初步 分析了铜藻在80 h 内同时对这几种无机盐吸收速率的随时间变化情况:无机磷吸收速率呈指数衰减，硅酸盐 吸收速率呈线性减少，亚硝酸盐吸收速率在实验初期受到抑制而后呈对数增加，氨氮作为优先氮源被吸收;通 过不同生物量铜藻对不同初始浓度硅酸盐的吸收实验，分析了24 h 内和lO d 内硅酸盐浓度变动规律以及硅 酸盐消失速率和铜藻对硅酸盐吸收速率的波动:10 d 内海水中硅酸盐浓度变化与硅酸盐初始浓度相关，与铜 藻生物量元关;海水中硅酸盐消失速率波动的剧烈程度与铜藻生物量和硅酸盐初始浓度相关。 关键词:铜藻;无机盐;吸收;浓度变化;消失速率 中图分类号:S 912 文献标识码:A The preliminary research of certain inorganic nutrient uptake kinetics of Sargassum horneri (Turn. ) Ag. SUN Hong-chao , ZHANG Shou-yu ( College 01 Marine Science and Technology , Shanghai Fisheries University , Shanghai 200090 , China) Abstract:Sαrgαssum beds in Gouqi Island , Zhejiang Province , are the target researching sea area in this paper. Based on the uptake experiments of Sargαssum homeri (Tum. ) Ag. on inorganic phosphate , silicate , nitrite and nitrogen , the fluctuation of the uptake rate in 80 hours is analyzed : the uptake rate of inorganic phosphate decreases with time exponentially; the uptake rate of silicate decreases with time linearly; the uptake rate of nitrite increases with time logarithmically and is suppressed at the initial stage Sargassum horneri (Tum.) Ag. absorbs nitrogen as N nutrient preferentially. Based on the uptake experiment of Sαrgαssum horneri (Tum.) Ag. on silicate with gradient biomass of Sαrgassum horneri (Tum.) Ag. and initial silicate consistency , the fluctuation and the correlati